<VV> Re: PG RAMPY POWER QUEST 110hp/140hp torque the same

[BobHelt at aol.com]

Hi Dan,
Thanks for writing. Please see below for comments.
Regards,
Bob helt
 
In a message dated 8/22/2006 5:43:07 AM US Mountain Standard Time,  
dsjkling at sbcglobal.net writes:

Actually, you're right about that now that I think about it a  little
more....but still, isn't the net effect of the 95HP cam coupled with  the 4
degree retard crankgear an attempt to broaden the torque curve and  lower it
compared to the standard 140HP? 
Well yes, that was the purpose. Chev only had three LM cams available to  
them. The 304 was out for several reasons. So that left the 95 and 110 cams. The  
110 cam was a "hi speed' cam and thus lacked the low speed push that the Pg  
needed (stall is 1600 rpm). They tried that with the very early 140-PG setups. 
 It didn't work well. So the choice was forced to the 95 cam. But while this 
had  the low end, the top end was lacking. Solution was to shift the TQ up the 
rpm  range by the 4 deg retard (about 400 rpm).
 

The max  torque for the 140HP and the 110HP
is still the same, just at different  RPMs, increasing RPMs increases HP not
Torque.  
Well, that begs the question. First you are stating ADVERTISED TQ and HP  
specs that have no relationship to reality. You need to look at the Chev  
published NET TQ and HP specs. Then you need to see on the curves that the 95 TQ  
shines up to 1600 rpm over the other two. But over 1600 rpm the 110 takes the  
honors for TQ up to about 2300 rpm. After that it's no contest. The 140  walks 
away from the other two engines in the TQ department.
 
 

There  are only three ways I know of to increase torque:

1) Increase  displacement
2) Nitrous
3) Turbo/supercharging

All of which mean  pumping more air/fuel at a given rpm.  


What about just increasing the compression ratio? That increases the TQ  
too.............. And you forgot improvements to airflow and combustion chamber  
design, plus a few more like chamber heat flows, and port tuning, etc.
 
Regards,
Bob Helt